Lefteris "Terry" Antonis (Greek: Λευτέρης "Τέρι" Αντώνης;[3] born 26 November 1993) is an Australian soccer player who plays as a midfielder for Thai League 1 side Uthai Thani.

[5] He first received media attention in Australia at the age of 10 by winning a football talent competition on the Channel 7 television show Today Tonight, which resulted in a trip to Madrid to make a training skills DVD with David Beckham.

[10] Antonis began his football career at St Christopher's Soccer Club in Bankstown before moving to Sydney Olympic and Marconi.

[18] In February 2012, Antonis reiterated his commitment to Sydney FC and the remainder of his three-year contract, stating that he was more than happy being at the club.

[19] In April 2012, Antonis travelled to Germany to trial with Bundesliga club Borussia Mönchengladbach as a potential replacement for Roman Neustadter.

[23] The 21-year-old returned to Sydney from preseason camp on the Gold Coast with News Corp reporting a $500,000 bid for the midfielder from PAOK FC.

Antonis made his debut for PAOK in the Greek Cup match away to Chania on 3 December 2015, coming on as a 64th-minute substitute for Eyal Golasa.

[35] He became the first player to play professionally for all four Melbourne and Sydney derby teams, beating Josh Brillante by a matter of days[36] Antonis was part of the final squad for the 2015 AFC Asian Cup but he did not get any actual game time during the tournament.

On 23 December 2015, Antonis was included to Australia U-23 national team manager's Aurelio Vidmar selections for Olympic Games 2016 qualifiers, which took place in Doha.